US4216013A - Ductile ferritic steels and their use for metallic articles, especially welded constructions - Google Patents

Ductile ferritic steels and their use for metallic articles, especially welded constructions Download PDF

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Publication number
US4216013A
US4216013A US05/947,332 US94733278A US4216013A US 4216013 A US4216013 A US 4216013A US 94733278 A US94733278 A US 94733278A US 4216013 A US4216013 A US 4216013A
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United States
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content
steels
contents
molybdenum
chromium
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US05/947,332
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English (en)
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Goran Gemmel
Christer Aslund
Barry Solly
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Definitions

  • ferritic chromium-molybdenum steels have been the subject of exhaustive investigations in order to ascertain the essence and structural relationship of the deficiencies attending these steels in relation to austenitic Cr-Ni steels so that they may be minimised or eliminated which is of particular economic significance in view of the advantages which these steels have over the austenitic steels among others.
  • the knowledge of the influence of the inclusion elements carbon and nitrogen has led to new metallurgical processes by which the contents of these elements can be reduced to below the hitherto usual levels.
  • this involves the use of metallurgical techniques and installations which use up a large part of the desired economy.
  • the results obtained have been unsatisfactory, particularly in regard to the position of the transition temperature, i.e. the temperature at which the steel changes abruptly from the ductile state to the brittle state.
  • stabilising elements for fixing the C- and N 2 -contents at the low contents of these elements of less than 0.03% led to additions which, for Ti for example, no longer correspond to the stoichiometry of 1:4, but instead had to be increased to 1:15 which gave contents that adversely affects the property values of the steels.
  • C and N 2 contents below 0.015% are now proposed, Si contents of 0-3%, manganese contents of 0-1%, nickel contents of 0-5% and copper contents of 0-2% being permitted in certain cases because no influence on the properties of these steels was associated with these elements in the ranges indicated, as is apparent from the mere fact that these elements need not be present.
  • the position of the transition temperature is particularly important for welding which is of course necessary in those cases where these steels are used for the manufacture of industrial products.
  • the abovementioned steels which, in the unwelded state, show ductility values of an acceptable nature become brittle in the weld seam and in the zones adjacent the weld seam.
  • the remarkable and completely unexpected feature of the invention is that, for relatively high (C+N 2 )-contents, relatively large amounts of nickel and, to a lesser extent, of copper have to be added to obtain high ductility values coupled with the same high resistance to corrosion at room temperature and at temperatures below room temperature, particularly in the welding zone.
  • the ductility values of steels A, B, C and D are shown in the form of graphs in FIGS. 1, 2, 3 and 4, respectively.
  • the curves "GM” relate to the base material whilst the curves “SZ” relate to the zones adjacent the weld seam which are particularly exposed to the influence of the welding temperature in terms of embrittlement.
  • Comparison of the curves "GM” of the two steels A and B shows that the transition temperature of the steel A according to the invention lies between -60° C. and -80° C. whereas the conventional steel B has a transition temperature which lies between +80° C. and +100° C.
  • Comparison of the curves "SZ” shows a transition temperature for the steel A according to the invention of from -40° C. to -20° C. and, for the comparison steel B, a transition temperature of from +120° C. to +140° C.
  • the curve "GM” for steel C shows a transition temperature in the range from -30° C. to -50° C.
  • the characteristic values are in the range from +10° C. to +30° C.
  • Comparison of the curves "SZ” shows a transition temperature for steel C according to the invention of from -10° C. to ⁇ 0° C. and, for the comparison steel D, a transition temperature of from +40° C. to +50° C.
  • the necessary degree of invention is embodied in the specified limits of the various alloying ranges, particularly for Ni and Cu.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Arc Welding In General (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Catalysts (AREA)
  • Meat, Egg Or Seafood Products (AREA)
US05/947,332 1976-05-28 1978-09-28 Ductile ferritic steels and their use for metallic articles, especially welded constructions Expired - Lifetime US4216013A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19762624117 DE2624117A1 (de) 1976-05-28 1976-05-28 Zaehe ferritische staehle und verwendung derselben fuer metallische gegenstaende, insbesondere geschweisste konstruktionen
DE2624117 1976-05-28

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US05801374 Continuation 1977-05-27

Publications (1)

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US4216013A true US4216013A (en) 1980-08-05

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ID=5979295

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US05/947,332 Expired - Lifetime US4216013A (en) 1976-05-28 1978-09-28 Ductile ferritic steels and their use for metallic articles, especially welded constructions

Country Status (21)

Country Link
US (1) US4216013A (it)
JP (1) JPS5386617A (it)
AT (1) ATA367777A (it)
BE (1) BE855081A (it)
BR (1) BR7703473A (it)
CA (1) CA1084734A (it)
CH (1) CH630414A5 (it)
CS (1) CS203149B2 (it)
DE (1) DE2624117A1 (it)
DK (1) DK234977A (it)
ES (1) ES459221A1 (it)
FI (1) FI67408C (it)
FR (1) FR2352893A1 (it)
GB (1) GB1566204A (it)
HU (1) HU175741B (it)
IT (1) IT1081419B (it)
NL (1) NL7705728A (it)
NO (1) NO149699C (it)
PL (1) PL111236B1 (it)
RO (1) RO74627A (it)
SE (1) SE441103B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374666A (en) * 1981-02-13 1983-02-22 General Electric Company Stabilized ferritic stainless steel for preheater and reheater equipment applications
US4456483A (en) * 1980-01-03 1984-06-26 Allegheny Ludlum Steel Corporation Ferritic stainless steel
US4456482A (en) * 1980-01-03 1984-06-26 Allegheny Ludlum Steel Corporation Ferritic stainless steel
US5393487A (en) * 1993-08-17 1995-02-28 J & L Specialty Products Corporation Steel alloy having improved creep strength

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH654594A5 (de) * 1981-03-16 1986-02-28 Bbc Brown Boveri & Cie Turbinenschaufelwerkstoff hoher festigkeit gegen korrosionsermuedung, verfahren zu dessen herstellung und seine verwendung.
JPH0717988B2 (ja) * 1991-03-08 1995-03-01 日本冶金工業株式会社 靱性および耐食性がともに優れるフェライト系ステンレス鋼

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258370A (en) * 1964-07-27 1966-06-28 Int Nickel Co High strength, notch ductile stainless steel products
US3677744A (en) * 1968-03-07 1972-07-18 Suwa Seikosha Kk Age hardening stainless steel
JPS478689U (it) * 1971-03-01 1972-10-02
US3837847A (en) * 1969-07-11 1974-09-24 Int Nickel Co Corrosion resistant ferritic stainless steel
DE2417632A1 (de) * 1973-04-10 1974-11-07 Daido Steel Co Ltd Ferritisch-austenitischer, nichtrostender stahl
US3856515A (en) * 1971-10-26 1974-12-24 Deutsche Edelstahlwerke Gmbh Ferritic stainless steel
US3865644A (en) * 1972-04-24 1975-02-11 Bofors Ab High strength, corrosion resistant, austenite-ferrite stainless steel
US4055448A (en) * 1973-04-10 1977-10-25 Daido Seiko Kabushiki Kaisha Ferrite-austenite stainless steel
US4119765A (en) * 1976-04-27 1978-10-10 Crucible Inc. Welded ferritic stainless steel articles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2153186A1 (de) * 1971-10-26 1973-05-03 Deutsche Edelstahlwerke Gmbh Verwendung ferritischer chromstaehle als korrosionsbestaendiger werkstoff fuer den chemischen apparatebau
JPS568489B2 (it) * 1974-10-07 1981-02-24

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258370A (en) * 1964-07-27 1966-06-28 Int Nickel Co High strength, notch ductile stainless steel products
US3677744A (en) * 1968-03-07 1972-07-18 Suwa Seikosha Kk Age hardening stainless steel
US3837847A (en) * 1969-07-11 1974-09-24 Int Nickel Co Corrosion resistant ferritic stainless steel
JPS478689U (it) * 1971-03-01 1972-10-02
US3856515A (en) * 1971-10-26 1974-12-24 Deutsche Edelstahlwerke Gmbh Ferritic stainless steel
US3865644A (en) * 1972-04-24 1975-02-11 Bofors Ab High strength, corrosion resistant, austenite-ferrite stainless steel
DE2417632A1 (de) * 1973-04-10 1974-11-07 Daido Steel Co Ltd Ferritisch-austenitischer, nichtrostender stahl
US4055448A (en) * 1973-04-10 1977-10-25 Daido Seiko Kabushiki Kaisha Ferrite-austenite stainless steel
US4119765A (en) * 1976-04-27 1978-10-10 Crucible Inc. Welded ferritic stainless steel articles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456483A (en) * 1980-01-03 1984-06-26 Allegheny Ludlum Steel Corporation Ferritic stainless steel
US4456482A (en) * 1980-01-03 1984-06-26 Allegheny Ludlum Steel Corporation Ferritic stainless steel
US4374666A (en) * 1981-02-13 1983-02-22 General Electric Company Stabilized ferritic stainless steel for preheater and reheater equipment applications
US5393487A (en) * 1993-08-17 1995-02-28 J & L Specialty Products Corporation Steel alloy having improved creep strength

Also Published As

Publication number Publication date
BR7703473A (pt) 1978-03-14
NO149699C (no) 1984-06-06
FI67408B (fi) 1984-11-30
HU175741B (hu) 1980-10-28
NL7705728A (nl) 1977-11-30
DE2624117A1 (de) 1977-12-08
GB1566204A (en) 1980-04-30
PL198448A1 (pl) 1978-01-16
CA1084734A (en) 1980-09-02
PL111236B1 (en) 1980-08-30
DK234977A (da) 1977-11-29
NO771873L (no) 1977-11-29
FR2352893A1 (fr) 1977-12-23
SE441103B (sv) 1985-09-09
RO74627A (ro) 1981-04-30
ES459221A1 (es) 1978-03-01
FR2352893B1 (it) 1978-11-03
ATA367777A (de) 1987-05-15
NO149699B (no) 1984-02-27
CH630414A5 (de) 1982-06-15
FI771566A (it) 1977-11-29
FI67408C (fi) 1985-03-11
BE855081A (fr) 1977-11-28
SE7705336L (sv) 1977-11-29
IT1081419B (it) 1985-05-21
JPS5386617A (en) 1978-07-31
CS203149B2 (en) 1981-02-27

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